I am using MongoDB to store data. In my project I am connecting multiple users(100-2000 users) to a server using thread pool and store the responses of those users in the database. But when I do this I am getting this error. Please help me with this. I am not able to get it. I have already wasted 45 hours on this error.
Error:
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.avaya.onex.hss.requesthandlers.CommandExecutor.executeCommands(CommandExecutor.java:129)
at com.avaya.onex.hss.requesthandlers.CommandExecutor.run(CommandExecutor.java:59)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db connection
at com.mongodb.DBPortPool.get(DBPortPool.java:176)
at com.mongodb.DBTCPConnector$MyPort.get(DBTCPConnector.java:370)
at com.mongodb.DBTCPConnector.say(DBTCPConnector.java:149)
at com.mongodb.DBTCPConnector.say(DBTCPConnector.java:138)
at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:261)
at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:211)
at com.mongodb.DBCollection.insert(DBCollection.java:57)
at com.mongodb.DBCollection.insert(DBCollection.java:102)
at com.avaya.onex.hss.objects.LoginRequest.storeData(LoginRequest.java:152)
at com.avaya.onex.hss.requesthandlers.LoginHandler.handleRequest(LoginHandler.java:20)
... 8 more
com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db connection
at com.mongodb.DBPortPool.get(DBPortPool.java:176)
at com.mongodb.DBTCPConnector$MyPort.get(DBTCPConnector.java:370)
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:212)
at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:305)
at com.mongodb.DB.command(DB.java:160)
at com.mongodb.DB.command(DB.java:183)
at com.mongodb.DB.command(DB.java:144)
at com.mongodb.DBCollection.drop(DBCollection.java:777)
at com.mongodb.DBApiLayer$MyCollection.drop(DBApiLayer.java:206)
at com.avaya.onex.hss.requesthandlers.CommandExecutor.executeCommands(CommandExecutor.java:118)
at com.avaya.onex.hss.requesthandlers.CommandExecutor.run(CommandExecutor.java:59)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Try increasing the number of connections in the connection pool.
Look here, at the connectionsPerHost.